#include<stdio.h>
void before() __attribute__((constructor));
void after() __attribute__((destructor));



int main(){
    printf("this is function %s\n",__func__);
    return 0;
}
void before()
{
    printf("this is function %s\n",__func__);
    return;
}
void after()
{
    printf("this is function %s\n",__func__);
}